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Keystone Species and Ecological Concepts
This deck covers key concepts related to keystone species, ecological relationships, population dynamics, and reproductive strategies. It includes questions and answers on topics such as intertidal competition, food webs, population growth, and symbiotic relationships.
Recall that some species in the intertidal zone are mobile, while others are sessile (stationary), and this affects how individuals compete with each other. Which of the following compete for space on intertidal rocks?
Muscles, Whelk, and Chiton
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Key Terms
Term
Definition
Recall that some species in the intertidal zone are mobile, while others are sessile (stationary), and this affects how individuals compete with each other. Which of the following compete for space on intertidal rocks?
Muscles, Whelk, and Chiton
The illustration below is a food web diagram for a subset of the ecological community surrounding Arctic sea ice. Based on the diagram and assuming it is complete for these species, which of the statements below is false?
Cod are eaten by seals and polar bears.
A group of biologists is studying the competitive relationships amongst strains of bacteria that exist in the guts of fish. The researchers have constructed a competitive dominance, hierarchy diagram for a particular set of conditions (shown below). Under these conditions, which bacterial strain is the least competitively dominant?
Strain T
What dramatically changes when starfish are removed from the simulated system?
The community becomes dominated by mussels.
Which of the following is not an essential characteristic of a keystone species?
Direct interaction with every other species in the community.
Which of the following methods will tell any ecologist about both the size and density of a population?
Mark and re capture
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| Term | Definition |
|---|---|
Recall that some species in the intertidal zone are mobile, while others are sessile (stationary), and this affects how individuals compete with each other. Which of the following compete for space on intertidal rocks? | Muscles, Whelk, and Chiton |
The illustration below is a food web diagram for a subset of the ecological community surrounding Arctic sea ice. Based on the diagram and assuming it is complete for these species, which of the statements below is false? | Cod are eaten by seals and polar bears. |
A group of biologists is studying the competitive relationships amongst strains of bacteria that exist in the guts of fish. The researchers have constructed a competitive dominance, hierarchy diagram for a particular set of conditions (shown below). Under these conditions, which bacterial strain is the least competitively dominant? | Strain T |
What dramatically changes when starfish are removed from the simulated system? | The community becomes dominated by mussels. |
Which of the following is not an essential characteristic of a keystone species? | Direct interaction with every other species in the community. |
Which of the following methods will tell any ecologist about both the size and density of a population? | Mark and re capture |
Humans have which type of survivorship curve? | Type I |
Which of the following is best at showing the life expectancy of an individual within a population? | life table |
How is a clumped population distribution beneficial for prey animals? | Being a member of a larger group provides protection for each individual from predators. |
Which of the following is associated with long-term parental care? | few offspring |
Which of the following is associated with multiple reproductive episodes during a species' lifetime? | Iteroparity |
Which of the following is associated with the reproductive potential of a species? | fecundity |
Species with limited resources usually exhibit a(n) ________ growth curve. | logistic |
The maximum rate of increased characteristic of a species is called its ______. | biotic potential |
The population size of a species capable of being supported by the environment is called its _____. | carrying capacity |
Species that have many offspring at one time are usually: | r-selected |
A forest fire is an example of ________ regulation. | density independent regulation |
Primates are examples of | K-selected species |
Which of the following statements does not support the conclusion that giraffes are k-selected species? | Newborn giraffes are capable of coordinated walking within an hour of birth, and running within 24 hours of birth. |
Which of the following events would not negatively impact Yellowstone's Grey wolf carrying capacity? | Snow in winter |
A country with zero population growth is likely to be ________. | economically developed |
Which type of country has the greatest proportion of young individuals? | economically underdeveloped |
Which of the following is not a way that humans have increased the carrying capacity of the environment? | use of language |
The first species to live on new land, such as that formed from volcanic lava, are called | pioneer species |
A symbiotic relationship where both of the coexisting species benefit from the interaction is called | mutualism |
Which of the following is not a mutualistic relationship? | a helminth feeding from its host |
Which type of mimicry involves multiple species with similar warning coloration that are all toxic to predators? | Mullerian |
The ability of rats to learn how to run a maze is an example of ________. | cognitive learning |
The training of animals usually involves ________. | operant conditioning |
The sacrifice of the life of an individual so that the genes of relatives may be passed on is called ________. | kin selection |
Why are polyandrous mating systems more rare than polygynous matings? | Only males are capable of multiple rounds of reproduction within a single breeding sea |